Switch.



PATENTED AUG. 28, 1906.

F. K. FASSETT.

SWITCH APPLICATION FILED APR. 27, 1904.

SHEETS-SHEET 1 iw 77 m 2 PATENTED AUG. 28, 1906 P. K. PASSETT.

SWITCH. APPLICATION FILED APR. 27, 1904.

4 SHEETS-SHEET 2.

4- SHEETS-SHBET 3.

PATENTED AUG. 28, 1906.

F: K. FASSE'E'T.

SWITCH.

APPLICATION FILED APR. 27,

, T l fiH A PI .W S v APPLICATION FILED APR. 27, 1904- 4 SHEETS-SHEET 4.

FRANCIS K. FiSSlQTT, 0F ST. LOUIS, MISSOURL ASSIGNOR, BY MESNE ASSIGNMENTS, 'lO Vi lLLlAl /l MAX NELL SUOT'l, OF PHILADELPHIA,

PENNSYLVANIA.

Patented Aug. 28, 1906.

Application filed April 27,1904. Serial No. 205,185.

To all whom may concern; I

Be it known. that I, Fnnnors K. ls essnrr, a citizen of the United States, residing at St. Louis, State of M isson'. -iav c invented new and useful Switch, of which the following is specification.

My invention relates to electrical switches, and more particularly to that type in which the contacts separate underoil or other suitable insulating material whereby electric currents of high pressure and considerable volume may be broken with a minimum of sparking or arcing.

My invention resides also in controlling or operating devices whereby the switch may be automatically tripped or released and whereby the operator robbed of control. of the switch if he attempts to close the switch dur-- ing the existence or continuance ol an undesired or abnormal electrical condition.

My invention resides also in other features herein-alter described, and pointed out in the claims.

For an illustration of a form my invention may take reference is to be had to the accompanying drawings.

Figure 1 is a top plan vie of the switch and its controlling mechanism. Fig. 2 an end elevation of theswitch and its operating mechanism. Fig. 3 is a front elevation, partly in section, otthe controlling and operating mechanism. Fig. dis a side clevational view, the oil-switch being shown partly in section. Fig. 5 is an enlarged view of the operating mechanism. showing the parts in position immediately. after being tripped. Fig. 6 is a view similar to Fig. 5, showing the position of the parts when the switch has reached open position. Fig. 7' is an enlarged front elevational view showing details of the control mechanism. Fig. 8 is a horizontal sectional View throii gh he base showing mode of connection of the supporting bracket. Fig. 9 is a cross-sectional view of the line 9 9 of Fig. 3. Fig. 10 is an. enlarged detailed view of the calibrating device. Fig. 11 is a sectional view showing method of supporting the porcelain portion of the switch upon the covcrof the lluid-reccptacle. Fig. 12 is an enlarged side clcvational view of a laminated contact-block and portion of the bridgingcontact adapted to'engage the same. Fig. 13 is a view similar to Fig. 12 showing the bolts 4: and 5 passing through the ears 6 and 7, respectively, of the brackets and through the switchboard 1. The brackets 2 and 3 are provided with the inturned flan es 8 and 9, which lit over the edges oi an insu siting-block 10, preferably of slate or marble, the flanges being secured to the block 10 by the bolts 11 and 12, the heads of which are preferably countersunk in recesses in the block 10.

Each of the brackets 2 and 3 is provided with an arm 18, having the horinontal ear or flange i l approximate to its outer end, and, each of the bradkets 2 and. 3 is provided with an arm 15, extending upwardly and provided at its upper end with a horizontally-extending hole to form a bearing to receive the horizontally-extdnding' rod 16, forming a bearing for parts hereinafter referred to; The brackets and 3 support three sheet-metal oil-tanks or receptacles 17, each of which is provided with perforations thereof. The metallic plate 19 forms a cover for the receptacles and has upwardly-turned flanges 20 around its edge and strengthened by ribs 21. In the center of the cover are 18 in its walls near the top three upw idly-extending flanges 23, through which extend vertical holes for purposes hereinafter described. Lugs 24: and 25 upon the cover-plate 19 support the vertical ly-extending rods 26 and 27, which latter tally-disposed bar 26 and serve as vertical guides for the vertical movement of the bar 28, which is connected by the links 30 to, the bell-c rank levers 31, pivoted on the .shaftlfi.

pass through the horizon- 9o 'lhrough the three flanges 23 upon the cover 5 19 are adapted to reciprocate three vertical rods 29, of wood or pthcr insulating material, which are hung upon the bar 28 by stirrup 29", fastened on the top of each rod 29 and having the screw 2? for adjustment purposes.

Three blocks 32, of porcelain or other insulating material, suitably :ast or formed are supported by and secured to the under side of the covered plate 19. Each porcelain block 32 consists of a hollow depending portion 33, which is completely immersed in the oil in tanks Shou1ders3-4 and 35 support plates 36 and 37, constituting clamps between which are secured the lamina of the laminated contacts 45 and 46. Bolts 38 projectthrough the'se clam sand through the thickened portions of t e shoulders 34 and -and engage plates 39 in the bottoms ofthe recesses in the u wardly-projecting tubular portions 40 of t e porcelain blocks 32. These recessed projections 40 extend thro ugh the cover 19 and are'provided with caps 41, having openings 42, through which the insulated cables or leads 59 60 project. The cables or circuit-leads are electrically and mechanically connected to the binding-posts 43, projecting up into the recesses of the portions-40p The we'r ends of the posts 43 are adapted to receive bolts 44, which extend throu the laminae of the contact-terminals 45 46. If desired, the laminae may be setured'to each other by means of rivets or other fastening devices. The tubular projections 40of the porcelain blocks 32 are jbined by the web portion 47. This web carlies a depending tubular partition, the tubular opening therein being-in alinement with the o ening 22 in the cover-plate 19; Through t tubular opening extends the rod 29,.

Which carries at its lower end the bridging member movable contact 48. The tubular partition 47 is slotted, and through the slot extends the bridging member 48, Whose surfaces are adapted to engage the ends of the laminw of the contacts 45 and 46. The angle ofthe contact-surface on'the'member 48 and of the contacts 45 and 46 are somewhat difi'erent, as shown in Fig. 12. On the clamping-plates 37 are provided shunt-contacts 49, which are adapted to be engaged by the movable shunt-contacts 51, carried by the resilient member 50, secured to the rod :29.

Any gases formed by arcs or other effects are permitted to pass u through the perfoe rated web 47 and out t irough the openings 18 in the walls of the tanks 17. To facilitate the discharge of gases, the top surface oi each web is provided with transverse grooves 52, which are in communication with ducts 48,

which communicate with the hollow portion of the block 32. Each insulating-block 32 is secured to the cover-plate 19 by means of bolts 53, whose nuts 54 engage in recesses 55 in the block 32. (See Fig. 11.) Each tank 17 is secured to the cover-plate 19 bymeans of a pin. 56, which extends through one of the openings 18, the cover-plate having a slot 57, which receives the eyebolt 58.

'l] lei-e being three complete switches shown each is independently adjustable with respect to the bar 23 by the stirrup and adjusting-screw at the top of each rod or stem 29. Bysuitably adjusting these screws 29 the bridging members 48 may all be caused to coineto. full circuit-closing position at the same time and to break the circuit at the same time. Power is transmitted to the stems or rods 29 by the bell-crank lever 13'! through the medium oi the handle and parts herrinafter described.

Bracket 61 is secured by suitable boils 6; to the front of the su'itchbiuu'd. lloi ween the horizontal poi-lions ca und (H. of the bracket 61 are supporied solenoids i353 and 66. A threaded tubul iide i7 is se ured to the lower member ol ui! pair oi' oid-supports, the tubular guide luv-xiii; 68 therein. Secured within the guide (57 and having a projvcl ion (3!) is u nut 70, adapted to be :uljuslnblo vertically in the guide 67 by LllO threaded rod 7!. The r d is provided with oppositoh-dispo,-ud idoi(w:- tions '72, normally seated in a groove ;'2; in the bottom of the guide, so but the rods Tl Will norinally be nou -rol:itsblc. l3 iiii iny; the projections 72 out oi groove 7 Elm rods 71 can be rotated to adjust the nut toward or away from the bottom. oi the guide. The nut acts as a sup iiort tor the reviproiatins soleno'icbcore 74, so that by adjusting the out the electrical condition to which the switch is to respond may be determined. I

The operating handle or arlustor 753 is pivoted between the cars 76 and 7. on bracket 61. At its lower portion the operating-lever is l')ll lll'(3l1l 0 l, coni 'irisiug tlu; [lat blades or plates Tilislotted at 79. or end of the liul; 80, which is pivot 4 '2 at 81 to one arm of the bell-crank lever Iii, (the link is insulated from the bolbrrank lever by the materia $22,) has a sliding (om nection with o'pci'atin -bandle 75 in the slots 79. -As viewed in Fig. 4, the slots 79 are in clined upwardl and outwardly from ihe switchboard 1, and the pin or roller carried by the link 80 and one: ing" in the slots 79 is hold at the inner end oi i .o slots b iri' 'cr inechunisn'i, consisting of the small lover i 5, pivoted to plates 7%; and carrying at its one end the roller Wt. A spring 86 wound about its pivot and is so applied as to i'orcrthe trigger 83 against the adjustable stop H5. also carried by the plates 7s. The end of the lever or link 80,which carries the pin or roller engaging in the slots 79, has its lower corner rounded off, while its upper corner is retained rectangular. The bracket 61 supports the horizontally-disposed shaft 257, having secured the to the arms 88 and 89 and the tappet 90 and the manual 91. In the top of" the solenoid are provided the plugs and '96, within which reciprocate the plunge'rs 93 and 94, adapted to receive the impacts irom the solenoid-cores. With the parts in circuit-closing position, as shown in Fig. 4, the roller 84 engages the end of the link 80, and because of the stop the lever or trigger 83, cannot rotate under the pressure exerted upon it, and in conseuence holds the lever 80 in the ends ol the s ots 79 nearest the switchboard. In this position the tendency is to rotate the handle dition obtains, the SOlGllOlCl-C-OTGS are drawn substantially downward directi n, and

upwardly by magnetic action, and either the arm 88 or the arm 89 is struck a blow, rotating the shaft 87 and the tappet 90 in a clock-- wise direction, as viewed in F 4 and 5. The tap'pet 90 thus causes the trigger or lever to rotate in a con nter-clocl wise direction about its pivot, thus movingt roller in allows the link 83to'ride with. its rounded-oil corner past the roller 84, and the link 80 then passes to the outer end of the slots 79 to the position shown in Fig. 5. The opening movement has, however, not con completed when this position is reached, for when the link 80 reaches outer end of the slot 79 a slight further movement occurs. and the handie falls to an approxin'iately horizontal position. It is the weight of the stems 29 and the bridging members carried thereby that supplies the force for the opening inovcment, though the spring 92 may be employed, if desired, to aid in throwing the handle 75. in the opening movement the bridgii'ig members 18 first separate from the lamb nated contacts 45 and 46, and later the movable shunt-contacts 51 separate from the i shunt-contacts 49, so that the final arc 00L at the shunt-contacts which are easily and cheaply renewable and prevents blistering or melting of the main contacts. is well understoo-d, the insulating fluid, such. as oil, assists in minimizing arcing, so that in a switch of moderate mechanical dimensions a highressure electric current may be successfully broken. When the pa; ts have reached lull open position, shown in Fig. 6, the spring 86 has returned the trigger a ainst its stop 85, and the outer end of the link is again at the inner ends of the slots 79. To close the switch, the handle or actuator 75 is 'raised by the operator and the roller 84:

passes around the corner of the link 80 until it strikes its flat surface, and in. so moving the link 80 is forced inwardly through the switchboard, and the bridgingmembers 48 are again raised toward circuit-closing pesi tion. When the parts are finally in circuitclosing position, as shown in Fig. 4, the roller 84 is in engagement with the list or straight end of the link 80.

The link 80 and the lower portion of the handle 7 5, comprising the plates 78, form a toggle which is overtra eled when the parts are in circuit-closing position, the toggle being broken when the circuit breaker is tripped. This toggle might be described as one in which the pivot connecting two links or. levers of the to gle is a shiftingpivot, the trigger 83 being adapted to confine the shifting-pivot at certain periods to form a toggle and adaptedto release it at other times. 4 ll it is attempted to close the switch during the continuance or existence of an abnormal or undesired elc itrieal condition at first contact, a soleimid-core is drawn upwardly and actuthe tappet 90 to tilt the lever 83, thus breaking the mechanical connection between the handle 75 and the link 80. This permits the bridging-contacts t8 to again drop and open the circuit. This non-closable tea ture-tb.a t is the robbin of the operator of control during the existence or continuance of an undesired electrical conditionis in this mechanism. constituted by toggle links or levers, whose common pivotal connection is a shifting one. When the pivotal connection in one position, the links or levers are adapted to slightly overtravel, so as to con- .stitute a lock for the switch, and when allowed to shil't the links or levers no longer form a toggle.

l l hat I claim is-- l. in an electric switch, the combination .Vlllll an insulalien-support, of laminated contacts having tree edges ol unequal lengths to form inclined faces, a hollow partition-wall between said contacts, a bridge cor'lrmrating with the tree edges of said laminated contacts, and a stern for supporting the bridge in position. andlor moving the same into and out olfoperative relation with the contacts, said stein projecting thri'iuolrsaid hollow par- 0 tit/ion, substantially as described.

2. in a multiple switch, the combination with a carrying-rod, of connecting-bridges loosely suspended from said rod, and means for independently adjusting said bridges with respect to said rod, substantially described.

In multiple switch, the combination with laminated contacts whose free edges are unequal in length, of bridges cooperating with said tree edges and having inclined faces at dill'erent angles l'roni the planes in which the unequal edges ol the laininations of the contact-blocks lie, stems for carrying said bridges, slotted i'uembers on said stems, set screws in said slotted members, a rod passing through said slotted members For supporting the same through the medium ol said setscrews, whereby each stem and the bridge supported thereby is independently adjustable with respect to said rod, substantially as described.

l. l ii an electric snitch, the combination with an operating --l1an(llo having an obliquely-arranged slot, of a link operatively mounted in the slot of said handle and connected to the movable contact ol. the switch, a trigger on said handle adapted to engage said link and means for controlling said trigger.

5. in an electric switch, the combination I contact number and a trigger mounted on said handle and adapted to engage said link to hold it insnch position that the movablecontact in engagement with the fixed contacts. l

7. in an electric switch, the combination with. fixed and movablecontacts, of a slotted lever, a link mounted in the slot of said lever and connected to the movable contact memher, 'a trigger mounted on said lever and adapted to engage said link to hold it in such p sition that th x movablecontact is in en gagement with the fixed contacts, and el'ec troresponsivc means for operating said trigger, substantially as described.

- S. In an electric switch, the combination with lixed. and movable contacts, of aslotted operating-handle, alink mounted in the slot of said handle and connected. to the movable contacts, a trigger mounted on said handle and adapted to engage said link to. hold it in such position that the movable contact is engagcd with the fixed contacts, and manually and electrically operable means for operating said trigger, snlistantially as described.

0. In an electric switch, the combination with a movable contact, of a link operatively connected to said m'ovable contact,"a. slotted handle, a trigger adapted to engage said link to hold "t at one end of said slot, whereby the movable contact is held in engagement with its cooperating fixed contacts, and means for actuating said trigger to disengage said link, whereby said link may travel to the other end oi said slot to actuate said handle, said handle being adapted to thereafter move indepcndentlyot said link.

10. in an electric switch, the combination with a movable contact, of an operating-handle normally locked thereto, means for onlocking the movable contact from the operating-handle and permit 1' ing independent movcment ol said movable contact without disturbing the poslllon of said handle, and means for limiting said independent movement ol movable contact with respect to said handle, whereby said handle is thrown to open position by and movable contact,

ll. ln an electric s\\il 'li, lhe combination with. a movable contact cl an operatinghandle normally connected there ilh, means for breaking cooperal i\'e connection between said handle and said movable contact and permitting the movable contact lo move independent ly ol' l he handle, and :1 stop on said .handle engaged to throw said handle to open position; r

12in an electric switch, the combinat on with aenovable contact, of an operating-ban d le normally connected to said movable contact, means for breaking cooperative connection between said movable contact and the handle and permitting the movable contact to initially move witl'iout disturbing the position ofthe handle, and means on'saio handle 7 5 an aged at the final movement of said movab e contactto move said handle to position for. reconnection with said movable contact.

' 13; In an electrie switch, the combination 'with movable and fixed contacts, of an opcrating-handle, a trigger carried by saidhar'n die and adapted to normally maintain the handle and the movahl ontact in cooperative relation, means for breaking the operative connection between the handlennd 85.

movable contact, whereby the movable c0ntactis permitted. to break the circuit, and meanson said handle engaged at the final movement of the movable contact to move said handle, whereby said trigger anay reeon- 0 substantially as described.

14. In an electric switch, the combination with a movable contact member, ofa handle nect said handle and the movable contact,-

for 'operating said member and normally locked in cooperative relation therewith, and. means for temporarily unlocking the handle from said contact member to open the circuit, whereby in moving to 0 )en position said eon-f tact member operates th substantially as described.

15. In an electric switch, the combination with a vessel containing an insulating fluid, of an insulation-support partially submerged in 1 o 5 said fluid, contacts carried by the insulationsupport, an immersed partition formed interal with the insulation-support,and arranged lietween the contacts,-a bridge movable with respect to the contacts, and a rod for supin port ing said bridge, said rod passing through an opening in the partition, substantially as descri bed 16. in an electric switch, the combination with a vessel containing an insulating fluid, 1 15 of an insulation-support partially submerged in said fluid, submerged contacts carried by said msulalien-support, a submerged bridge movable with respect to said contacts, a

yielding means movable with the bridge for 12 connecting the contacts after the circuit is 1 opened by the bridge, and means on the bridge for moving the submerged secondary contact means out of engagement with the contacts after the bridge is moved out of 011- at ing-lnmdle normally locked in cooperative If? e handle to'reestab- I oo lish engagement between it andsaid handle,

steer? relation therewith, a trigger for unlocking said contact member and permitting its movement independently of the handle, whereby it moves freely without having to overcome the resistance offered by the handle, and vmeans on said handle engaged at the end of said independent movement, whereby said barn dle is moved to osition to permit said trigger to again lock handle together, substantially as described.

18. In an electric switch, the combination with a movable contact member, of a handle normally connected therewith for moving said contact member to close the circuit, means on the handle for breaking cooperative relation between said handle and. con-' tact member to open the circuit, as d opening movement being independent oi the handle, and means on said handle engaged when the circuit is open to throw said handle to position to permit its reconnection with said contact member, substantially as described.

19. In an electric switch, the combination with a vessel containing an insulating fluid, of an insulation-support forming a cover for said vessel and provided with an integral partition, contacts on each side of the partition, said partition and contacts extending down into the insulating fluid, and a bridge projecting through the partition and movable into and. out of engagement with the con-- taots, substantially as described.

20. In an electric switch, the combination. with a vessel containing an insulating fluid, of an insulation-support forming a cover for the vessel, and havm g a hollow slotted partition, contacts supported by said insulation.- support onthe respective sides of the parti ti on, an element movable in the hollow partition, a bridge carried by said element and projecting-through the slots in the partition and actuated by the movable element to be moved into and outof engagement with the contacts, substantially as described.

u 21. in an electric switch, the combination With a vessel containing an insulating fluid, of an insulation-support in the fluid having a hollow immersed portion, and hollow projed tions extending above the level of the insulating fluid, a web connecting the hollow projections, a hollow partition carried by the web, binding-posts extending through portions of the insulating-sup ort on each side of said partition, contactlocks carried by the binding-posts, a reciprocatory rod movable in the hollow partition, and a bridge carried by the rod and projecting through the partition for engagement with the contact-blocks, substantially as described.

22. An insulation for electric switches comprising a block having a lower hollow port on, upper hollow projections, a perforated web connecting the ho low proje tions, and a s otted hollow partition carried by the Web, substantially as described.

said contact member and.

23. in an electric switch, the combination with a base, of a vessel containing an inertlating fluid, contacts immersed in the fluid, a bridge movable in the fluid to close the contacts, a bridge-stem, a lever supported by said base and connected to said stem, an ac tuating-lcver carried by said base and provided with an. obliquely-alranged slot, a link connection. pivotally secured to the firstnamed lever and having a part to work in the slot of the actuatingdever, and means for maintaining said part in a state of rest in the slot, substantially described.

In an electric switch, the combination with a base, of vessel containing an insulating fluid, contacts immersed in the fluid, a bridge movable in the fluid to close the cona bridge-stem, a lever supported. by said base and provided with an obliquely-arranged slot, a link connection pivotally scoured to the first-named lever and having a part to work in the slot of the actuatingdever, and pivoted means for maintaining said part in a state of rest in the slot, substantially as described.

2:. in an electric switch, the combination with a of a vessel containing an insulatingfluid, contacts immersed in the fluid, a bridge movable in the fluid .to close the contacts, a bridge-stem, a lever supported by said base and connected to said stem, an actuating-lever carried by said. base and pivotcd with an obliqucly-arrangcd slot, a link connection pivotally secured to the iirstnamed. lever and having a part to work in the slot of the actuating-lever, and springpressed pivoted. means tor maintaining said part in a state of rest in the slot, substantially as described.

26. in an electric switch, the combination. with a base, of a vessel containing an insulating fluid, contacts immesed in said fluid, a bridge movable in said fluid to close the contacts, a bridg -stem, a lever supported by said base and connected to said stem, an actuating-lever carried by said base and provided with a slot, a link connection pivotally secured to the first-named lever and having a part to work in the slot of said actuating-lever, and means on. said actuating-lever for maintaining said link in a state 05 rest with relation to the slotted part of the actuatinglever, said means being movable out of engagement with said link to permit movement thereof along the line of said slot to throw the actuating-lever, substantially as described.

27 in an electrical switch, the combination with a base, a vessel containing an insulat ing fluid, contacts immersed in. said fluid, a bridge movable in said fluid to close said contarts, a bridge-stem, a lever supported by said base and connected to said stem, a handle carried by said base and provided with a slot, a link connection pivotally secured to the first-named lever and having a part to IIO work in. said slot of said handle a trigger [or releasing said link from said handle, and clectrically-operated means for actuati said trigger, substantially as described.

28. In an electric switch, the :ombination. with spaced contacts, of means for bridging said conlacts, a bridgc-sten1 carried by said means, a lever connected to said stem, a link connected with said lever, a pivoted and slotted element engaged. by one end of said link connected to said lever, a pivoted and slotted element engaged by one end of said link and. having a throw when said link moves along said slot, a trigger for releasing said link,- a rock-shaft, crank-arms on said roeleshaft 'lor relr'iasing said trigger from engagement with said link, and means for actuating said rockshaft including an electrically-controlled tappet device, substantially as described.

' 30. In anv electric switch, the combmation -with spaced contacts, of means for bridging d contacts, a bridge-stem carried by said means, a lever connected to'said stem; a link connected to said lever, pivoted and slotted element engaged by one end of said link and having a throw when said link moves along said slot, a trigger for releasing said link, a roek shalt, and a erank arin on said rockshaft for releasing said rock-shaft, substantially described.

31. In an electric switch, the combination with a vessel containing an insulating fluid, of a chambered insulation-support arranged in said vessel and having depending marginal .flanges'at its sides, a hollow partition-wall for dividing the flange-formed chamber into compartments, stationary contacts in the several compartments, a bridge cooperating witl'i Il stationary contacts, and a stem extending through-said hollow partition-wall upon which said bridge is mounted, substantially as described. y

32. In an electric switc'l1 ,-the combination with a vessel containing an insulating fluid, of a cover tor the vessel, an insulation-support having hollow bosses eXtencling-up wardly through said cover, said insulationsupport also having depending marginal flan tral arranged hollow partitionavall integral with said insulationsupport, stationary 0011-. tacts mounted on lodges in vertical alinement with said u pw ardly-extending bosses, a bridge cooperating with said stationary contacts, and a stem extending through said hollow 1 actuator lever ,es extending down into said fluid, a con partition-.wall and upon which stem said bridge is .mounted, substantially as described. i i

In an electric switch, the combination with a vessel containing insulating fluid, of stationary contacts immersed in said fluid, an insulation piece having marginal flanges, around said stationary contacts, a partition wall integral with said flanges and arranged between said stationary contacts, and means for opening and closing the circuit through said stationary contacts, substantially as described.

34. In an electrical switch, a hollow insulating-support, a partition dividing the cavity into chambers, a contact mounted in each chamber, a bridging contact extending through said partition, and means for operating said bridging member located withln said partition.

35. In an electrical switch, a movable contact member, levers for operating said contact member, a shiftable' pivot for connecting said levers together to form a toggle, and a trigger on one of said levers for confining said pivot.

36. In an electrical switch, a movable contact member, a lever for communicating movement to said contact member, an act'u aior-levcr, means for connecting. said levers together to term a toggle, and means upon one of said lovers for-lockin toggle relation.

37. In an electrical switch, a movable con-1 tact member, a lever for communicating movement to said contact member, an'aotuat'or-lever, a guiddior permitting free movement of said levers with respect to each other, and means upon one of said levers for locking said levers together to form a toggle.

In an electrical switch, a movable contact member, a lever for communicating movement to. said contact member, an actuator-lever having a .slot in which said firstmentioned-lever is movable, and means for barring said first-mentioned lever in predeter-" mined position in said slot, whereby said levers are connected together to form atoggle. 39, In an electricalswitch, a movable contact member, a lever .for communicating g said levers in- ICC movement to said contact member, axiactuator-lever, said levers being adapted to move freely wi h respect to each other, a guide for for locking said levers in predetermined position with respect to each other, whereby said member. I x 4 40. In anelectrical switch, a movable contact member, a lever for commumcatmg movement to said contact member, 'an-actumay operate said contact permitting said free movement, and-means.

tion with moment to each otli to form to i Z1 gle.

movement to said contact member, an actu ator-ever, means for connecting said levers together to form a toggle, and eloctroresponsive means for breaki. said connection upon attempted iuovemei'it of said contact niein ber into normal position during the existence or continuance of predetermined electrical conditions.

42. In an electrical switch, means loro'peratin a movable contact member comprising togg e-levers operatively connected with each other, and means for breaking the operative connection. between said toggle-levers.

' 43. In an electrical switch, a toggle, a movable contact member operatlvely connected with a link of said toggle, a handle opens tively connected with another link of said toggle, means for operative 3; connecting said toggle-links with each other, and means for breaking the operative connection. between said to gle-lurks.

ll. in. an electrical switch, a movsble contact member, toggle having operative connection with said contact member, means ongaging a toggle-link to maintain it in operative connection with anotlier toggle-link, and

- electroresponsive means for breaking the operative connection between the togglelinks. 45. ln an electrical swl cli, a movable con-- tact member, a toggle having operativecon 'nection with said contact member, and means for preventingtlie movement of said contact member into normal position during the eX- istence or continuance of predetermined electrical conditions comprising electrores iom sive means for breaking the operative con nection between tlic of toggle.

l6. In electrical switch, it toggle, movable contact member, having operative con nection with link ofsaid toggle, an operating-handle having ooerative connection with. another link of saicl toggle, means'engaging a link of said toggle to maintain itin operative relation with another link of said toggle, and ineans for preventing the movement of said contact member into normal position during the existence continuance oi predetermined electriccl'conditiolns comprising elect'r responsive means for breaking operative connection between toggle-links.

47. In an clectricalstvitcli, toggle, a movable Contact membe having operative connectionvvitli a link of said toggle, a handle connected to another link of said toggle, a. sliiftable ivotal connection between links of said togg e, and a trigger for confining said connection.

48. In an electrical switch, atogglaeinovable contact member having 0 eretive con-- nection with a link of said togg e, and a bandle connected to another link ofsaid toggle, a

sliilta'ole pivotal comiection between links of said toggle, and electroresponsive means for controllmg said slurtable connection to re lease said links from each other, wherebysaid contact member may move independently of said handle upon atten'zfited movement of Said contact member into normal position. during the existence or 001 iuance of predetermined. electrical conditions.

50. lln an electric switch, a movable contact member, an actuator having a slot, 2. member for communicating movement to said contact member and mounted for movement insaid slot, and a detent adapted to engage said member for conlinin said member in a 'edeterinined position in said slo In an electrical switch, a movable contact member, an actuator, having a slot, a lever for communicating movement to said cont act member and mounted for movement in said. slot, a trigger adapted to engage said lever for confining said lever in a predeter controlling said trigger.

In an electric switch, a movable conmsniber, an actuator having a slot, a le vel for communicating movement to said contact member and mounted for movement in said slot, a trigger adapted to engage said lever for confining said lever in a predcten inioed position. in said slot, and electroresponsive means for controlling said trigger.

53. in an electrical switch, a movable con tact member, an actuator having a slot, 2. link mounted in said slot and having operative connection With said movable contact member, a trigger on said actuator for confining said link to confine it in a predetermined position in. said slot, and electroresponsive means for controlling said trigger.

54. In an electrical. switch, a movable con tact member, an actuator having a slot, a link having operative connection with said movable contact member and movable in said slot, a trigger on said actuator adapted to engage said link to confine it in a predetermined position in said slot, and electrore- IIO travel to lock theswitch in normal position,

and means for controlling said engaging means for breaking operative connection between said links. I 15 57, In an electrical switch; contactoperat ing mechanism comprising indemomlentlymovable links, a trigger .lor locking saitl links together to form a toggle, Slhl toggle being adapted. to overtrnvel to leek the switch in. normal position, and means for controlling said trigger to break operative connection between said links.

In testimony whereof I hereunto nllix my si nature, in the presence ol two witnesses, t iis 25th day of April, 1904..

FRANCIS K. mssicir'r. Witness 2s:

F. R. CORNWALL, GEORGE BAKEWELL. 

